Composite molecular sieve in ten-element cyclic structure and its synthesis process

A composite molecular sieve and ten-membered ring technology, which is applied in the field of preparation of the above-mentioned composite molecular sieve, can solve the problems of prolonging the process flow, increasing the difficulty of operation, increasing investment costs, etc., and achieves the effects of high yield, low pour point and high viscosity index

Inactive Publication Date: 2006-05-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But both processes have shortcomings. The former cannot effectively play the synergistic effect of the mixed molecular sieve co

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] 130 grams of 85% orthophosphoric acid was added to the mixture of 80 grams of pseudo-boehmite (ignition loss 32.5%), 15 grams of hydrogen-form ZSM-23 molecular sieve and 502 grams of water, stirred for 3 hours, and then added 136 grams of bismuth N-Propylamine, and finally 73.9 grams of 30% silica sol was added. The molar composition of silicoaluminophosphate colloid is: Al 2 O 3 : P 2 O 5 : SiO 2 :R:H 2 O=1.0:1.0:0.6:2.4:56, the amount of ZSM-23 molecular sieve added is the amount of silica-aluminophosphate colloid (Al 2 O 3 +P 2 O 5 +SiO 2 ) 8% of the total weight. After stirring for 12 hours, it was transferred to a 1000 ml autoclave. After sealing, the stirring speed was adjusted to 300 rpm, the temperature was started, and the temperature was raised to 200° C. in 4 hours, and hydrothermal crystallization was performed for 48 hours. After the completion of crystallization, the autoclave was placed in water for rapid cooling, and the product was filter...

Example Embodiment

[0027] Example 2

[0028] 130 grams of 85% orthophosphoric acid, add to the mixture of 80 grams of pseudo-boehmite (ignition weight loss of 32.5%) and 502 grams of water, stir for 3 hours, add 15 grams of potassium type ZSM-22 molecular sieve raw powder, stir for 3 Hour, then add 136 grams of di-n-propylamine, and finally add 73.9 grams of 30% silica sol. The molar composition of silicoaluminophosphate colloid is: Al 2 O 3 : P 2 O 5 : SiO 2 :R:H 2 O=1.0:1.0:0.6:2.4:56, the added amount of ZSM-22 molecular sieve is in the silica-aluminophosphate colloid (Al 2 O 3 +P 2 O 5 +SiO 2 ) 8% of the total weight. After stirring for 12 hours, transfer to a 1000 ml autoclave. After sealing, adjust the stirring speed to 300 rpm, start to heat up, heat up to 120°C in 4 hours, hydrothermally crystallize for 12 hours, and then heat up to 200°C in 4 hours. Thermal crystallization for 48 hours. After the completion of crystallization, the autoclave was placed in water for rapid cooling, the product...

Example Embodiment

[0029] Example 3

[0030] 130 grams of 85% orthophosphoric acid, add to the mixture of 80 grams of pseudo-boehmite (ignition weight loss of 32.5%) and 502 grams of water, stir for 3 hours, add 15 grams of sodium type ZSM-5 molecular sieve powder, stir for 3 Hour, then add 136 grams of di-n-propylamine, and finally add 73.9 grams of 30% silica sol. The molar composition of silicoaluminophosphate colloid is: Al 2 O 3 : P 2 O 5 : SiO 2 :R:H 2 O=1.0:1.0:0.6:2.4:56, the added amount of ZSM-5 molecular sieve is in the silica-aluminophosphate colloid (Al 2 O 3 +P 2 O 5 +SiO 2 ) 8% of the total weight. After stirring for 12 hours, transfer to a 1000 ml autoclave. After sealing, adjust the stirring speed to 300 rpm, start to heat up, heat up to 120°C in 4 hours, hydrothermally crystallize for 12 hours, and then heat up to 200°C in 4 hours. Thermal crystallization for 48 hours. After the completion of crystallization, the autoclave was placed in water for rapid cooling, and the product was ...

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Abstract

The composite molecular sieve in ten-element cyclic structure has ten-element cyclic Si-Al structure and ten-element cyclic aluminum silicon phosphate structure. It is prepared through adding ZSM-22, ZSM-23, ZSM-5, EU-1, NU-87 or other ten-element cyclic structure Si-Al molecular sieve into aluminum silicon phosphate sol obtained via mixing Si source, Al source, P source, water and template agent to obtain primary sol; and subsequent hydrothermal crystallization to obtain the compound molecular sieve. The synthesis conditions may be altered based on the requirement to change the two phase ratio and the Si/Al ratio. Normally, the added amount of ten-element cyclic Si-Al molecular sieve is 0.01-0.6 time the total oxide weight in the aluminum silicon phosphate sol. The composite molecular sieve in ten-element cyclic structure may be used in the isometric dewaxing of lubricant oil and the isometric pour point depression of diesel oil and exhibits excellent catalytic performance.

Description

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Claims

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Application Information

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Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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